Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 020911
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
211 AM PDT SUN AUG 2 2015

.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.

THE SAT IMG INDC CLDY AREAS OVR THE NRN HALF OF THE REGION WITH
ISOL LIGHTNG. THE RADAR HAS NO INDC OF STRNG TSTMS CELLS OVR THE
REGION. AT 02/0600Z LOW PRES 1014 MB W OF THE SRN WTRS HAS A TROF
XTNDG NE INTO THE CNTRL WTRS. A WEAK INLAND TROF LIES ALNG THE CA
COAST. HGH PRES 1027 MB CNTRD NR 40N150W HAS ITS RIDGE INTO THE
NRN WTRS WHILE ITS SE EXTNSION REACHES THE SRN WTRS. THE PRES
GRDNT IS FAIRLY WEAK AND THE MAX OBS WINDS ARE 20 KT. THE LAST
R-SCAT PASS AT 1907Z HAD 30 KT WINDS OVR THE WRN PORTIONS OF THE
OREG WTRS.

UPPLVL TROF JUST W OF THE SRN WTRS HAS SOME LOCALLY INDCD ENERGY
THAT WILL ALLOW IT TO PERSIST INTO THE XTNDD PRD. THE UPPRLVL
RIDGE ACRS THE REGION WIL PREVENT THE LOW PRES FROM REACHNG THE
WTRS. MORE SIG ERNGY JUST SE OF THE ALEUTIAN ISLANDS WILL DROP SE
TWD THE REGION BUT AGAIN THE PERSISTENT UPPRLVL RIDGE WILL PUSH
THAT ENERGY JUST N OF THE REGION. MEANWHILE THE UPPRLVL RIDGE WILL
SHIFT E AND THAT WILL GIVE WAY TO THE ENRGY TO THE S TO REACH THE
SRN WTRS. THIS SENARIO WILL THEN CHNGE THE SYNOP PATTERN AS HGH
PRES WILL BUILD FROM THE W WHILE THE INLAND TROF WILL BENEFIT FORM
THE ENERGY THAT WILL REACH THE WTRS. THE END RESULT WIL BE A
TIGHTER PRES GRDNT ESPCLY OVR THE ERN PARTS OF THE CNTRL REGION
WHERE WINDS WILL BE ELEVATED TO GALE FORCE JUST BEFORE END OF PRD.

THE GLBL MDLS HV INITIALIZED WELL AND THEY ARE STIL IN GUD AGRMNT
AND SO NO NEED TO DEVIATE FROM THE PREVIOUS FRCST SOLN. AS SUCH
WILL STAY WITH GFS AND KEEP THE WRNGS IN THE XTNDD PRD. THE HGH
PRES WILL PERSIST TO THE W OF THE REGION WHILE THE INLAND TROF
WILL WEAKEN IN THE SHORT TERM. THE INLAND TROF WILL STRENGTHEN TWD
THE END OF FCST PRD AS HGH BUILDS IN FROM THE W AND THAT ALLOW
WINDS TO INCRS TO GALE FORCE THRESHOLD.

.SEAS...THE SEAS ARE STILL SMALL WITH HGHST SEAS PEAKING AT 9 FT
OVR THE OREG WTRS. SEAS RANGE BETWN 3 AND 6 FT ELSEWHERE. THE NWW3
MULTI GRID WV MDL CONTINUES TO AGREE WELL WITH THE OBSVD SEAS
PATTERN AND HAS BEEN QUITE CLOSE TO THE ECMWFWV AND SO WILL
CONTINUE TO STAY CLOSE TO IT.


.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.


.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

.PZ6 CALIFORNIA WATERS...
.PZZ820...INNER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE POSSIBLE THU INTO THU NIGHT.

$$

.FORECASTER MUSONDA. OCEAN PREDICTION CENTER.



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